CODEWITHSUNDEEP
pythondjangomongoengine
Jeff E
Jeff E

Reputation: 105

How do you delete an embedded document using Mongoengine?

I have a collection that has an EmbeddedDocumentField. I'm having trouble finding examples of how to delete an embedded document from the collection. Can someone provide me with an example or reference to one?

Here is what my setup looks like:

Code:

class Merchant(Document):
    merchant_id = StringField(max_length=50)
    merchant_name = StringField(max_length=150)
    merchant_name_search_alias = StringField(max_length=150)
    website = StringField(max_length=150)
    location = ListField(EmbeddedDocumentField(Location))
    address = StringField(max_length=50)
    city = StringField(max_length=30)
    state = StringField(max_length=20)
    zipcode = IntField()
    phone_nummber = StringField(max_length=10)
    sub_lat = FloatField()
    sub_lng = FloatField()
    country = StringField(max_length=20)
    promotion = ListField(EmbeddedDocumentField(Promotion))


class Promotion(EmbeddedDocument):
    provider_name = StringField(max_length=50)
    provider_website = URLField()
    promo_name = StringField(max_length=300)
    promo_name_search_alias = StringField(max_length=100)
    retail_price = DecimalField(precision=2, force_string=True)
    discount_price = DecimalField(precision=2, force_string=True)
    deal_url = URLField()
    buy_url = URLField()
    deal_image_url = URLField()
    description = StringField(max_length=1000)
    start_at = DateTimeField()
    end_at = DateTimeField()
    category = StringField(max_length=50)
    dq_category = StringField(max_length=50)
    keywords = StringField(max_length=100)

Upvotes: 7

Views: 6615

Answers (2)

ali lotfi
ali lotfi

Reputation: 11

user = User_.objects(username=username).get()
for ad in user.ads:
    if str(ad["_id"]) == id:
        user.ads.remove(ad)
user.save()

this is the only way i found to remove a value from an array of embeded doc

Upvotes: 1

Ross
Ross

Reputation: 18101

You can $unset a field using MyDoc.objects.update(unset__myField=1) Or using $pull to remove a single value from a list eg: MyDoc.objects.update(pull__myField=Value)

See: https://docs.mongoengine.org/guide/querying.html?highlight=unset#atomic-updates

Upvotes: 9

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